Citibikes

On a recent trip to Manhattan to escort my kids to a bus we walked by a stand of Citibikes. These are rent-able and you just leave them at a stand near your destination. While waiting for the kids to board the bus I saw a guy riding a bike with a trailer attached with 3 Citibikes mounted to it, heading in the direction of the 8th Ave bicycle stand. After I took the shot below there were 3 more bikes with trailers in tow that went by. It looks like some manual effort is needed to keep the bikes stocked in certain places.